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<H1>IBM Visualization Data Explorer Programmer&#39;s Reference</H1>
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<H3><A NAME="HDRDXQHE" HREF="progu097.htm#PToC_374">DXQueryHashElement</A></H3>
<A NAME="IDX1981"></A>
<A NAME="IDX1982"></A>
<P><STRONG>Function</STRONG>
<P>
Searches a hash table for an element matching a specified key.
<P><STRONG>Syntax</STRONG>
<BR>
<TT><STRONG><BR>
&#35;include &lt;dx/dx.h&gt;<BR>
<P><BR>
Element DXQueryHashElement(HashTable hashTable, Key searchKey)<BR>
</STRONG></TT><BR>
<P><STRONG>Functional Details</STRONG>
<P>
If a hash function was provided when the table was created, that
function is used to derive a

long integer

pseudokey from
<TT><STRONG>searchKey</STRONG></TT>; otherwise, the first

long integer

of <TT><STRONG>searchKey</STRONG></TT> is
assumed to be the pseudokey.
If a compare function was provided when the hash table was created,
then more than one element may be stored with the same
pseudokey.
<TT><STRONG>DXQueryHashElement</STRONG></TT> will use this compare function
to return the element that matches the
<TT><STRONG>searchKey</STRONG></TT>.
<P>
<TT><STRONG>Key</STRONG></TT> is defined as:
<PRE><STRONG>
typedef Pointer Key;
</STRONG>
</PRE>
<P><STRONG>Return Value</STRONG>
<P>
Returns the element if found or returns <TT><STRONG>NULL</STRONG></TT>, but
does not set an error code.
<P><STRONG>See Also</STRONG>
<P>
<TT><STRONG>
<A HREF="progu125.htm#HDRDXCH">DXCreateHash</A>
</STRONG></TT>
<P>
<A HREF="progu070.htm#HDRHASH">14.5 , "Hashing"</A>.
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